EP0204474A1 - Procédé et dispositif pour le forage directionnel contrôlé des puits - Google Patents

Procédé et dispositif pour le forage directionnel contrôlé des puits Download PDF

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Publication number
EP0204474A1
EP0204474A1 EP86303938A EP86303938A EP0204474A1 EP 0204474 A1 EP0204474 A1 EP 0204474A1 EP 86303938 A EP86303938 A EP 86303938A EP 86303938 A EP86303938 A EP 86303938A EP 0204474 A1 EP0204474 A1 EP 0204474A1
Authority
EP
European Patent Office
Prior art keywords
fluid
borehole
earth
drilling
boring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP86303938A
Other languages
German (de)
English (en)
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EP0204474B1 (fr
Inventor
Lawrence J. Leising
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Analysts International SA
Original Assignee
Analysts International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Analysts International SA filed Critical Analysts International SA
Publication of EP0204474A1 publication Critical patent/EP0204474A1/fr
Application granted granted Critical
Publication of EP0204474B1 publication Critical patent/EP0204474B1/fr
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/04—Directional drilling
    • E21B7/06—Deflecting the direction of boreholes
    • E21B7/065—Deflecting the direction of boreholes using oriented fluid jets

Definitions

  • whipstock tool which is cooperatively arranged for drilling a reduced diameter pilot hole in a desired lateral direction and inclination from the original borehole course.
  • wh i p st o ck tools necessitates removal of the drill string to install a special whipstock guide and a reduced size drill bit in the borehole.
  • Special measuring devices are then employed to position the whipstock as required for drilling the pilot hole in a given direction.
  • a "big eye” drill bit which has one of its several fluid nozzles enlarged and arranged to discharge a jet of the drilling mud in a selected lateral direction.
  • rotation of the drill string is temporarily discontinued.
  • the drill string is manipulated so as to position the big eye bit with its enlarged nozzle facing in the direction in which the borehole is to be subsequently deviated.
  • the mud pumps of the drilling rig are then operated so that a concentrated jet of the circulating drilling mud is forcibly discharged against the adjacent borehole wall surface so as to progressively erode away or carve out a cavity on that side of the borehole.
  • U.S. Patent Nos. 3,593,810 and 4,307,786 respectively depict two directional drilling tools which are each selectively energized as rotation of the drill string carries a wall contacting member into momentary contact with the lower wall of an inclined borehole interval.
  • the tool described in the first of these two patents is cooperatively arranged so that as the drill string is rotated, the periodic contact of the actuating member with the borehole wall is effective to selectively extend a laterally movable guiding member on the tool and thereby continuously urge the drill bit in a given lateral direction.
  • the tool described in the second of these two patents is provided with a source of pressured fluid.
  • the pressured fluid is repetitively emitted from a selected nozzle in a conventional drill bit so as to continuously direct the pressured fluid against only a selected circumferential portion of the borehole.
  • continued operation of this prior art tool will be effective for progressively diverting the drill bit toward that portion of the borehole wall.
  • these two prior art tools are wholly dependent upon their respective actuating members being able to contact the borehole wall above the drill bit. Thus, should there be portions of the borehole wall which are so washed out that they cannot be contacted when these actuating members are fully extended, these particular tools will be incapable of operating properly in that borehole interval.
  • the objects of the present invention are further attained by providing new and improved directional drilling apparatus adapted to be coupled to rotatable earth-boring apparatus and dependently suspended in a borehole from a tubular drill string having a drilling fluid circulating therein.
  • Means including two or more fluid passages in the earth-boring apparatus are cooperatively arranged for discharging angularly spaced streams of the drilling
  • the various bodies 19-22 are cooperatively arranged for respectively enclosing data-signalling means 23, direction measuring means 24 and direction controlling means 25.
  • the tubular body 20 may also be arranged for enclosing typical condition-measuring means 26 for measuring such conditions as electrical or radioactivity properties of the adjacent earth formations, the temperature of the drilling mud in the borehole 15 as well as one or more operating conditions such as weight-on-bit and the torque in a selected portion of the drill string 11.
  • typical condition-measuring means 26 for measuring such conditions as electrical or radioactivity properties of the adjacent earth formations, the temperature of the drilling mud in the borehole 15 as well as one or more operating conditions such as weight-on-bit and the torque in a selected portion of the drill string 11.
  • the drill bit 14 is a typical rotary drill bit having a plurality of cutting members such as conical cutters 28-30, rotatably journalled in a sturdy body 31.
  • the upper portion of the bit body 31 is cooperatively threaded, as at 32, for threaded engagement with complementary threads 33 on the lower end of the tool body 22.
  • the bit body 31 includes flow-dividing means 34 such as three fluid passages 35-37 cooperatively arranged for dividing the drilling mud 17 flowing through the drill string 11 and evenly distributing these divided mud streams so as to flow between the bit cones 28-30 to cool and fluid into the adjacent portions of the borehole to clear away formation materials from the borehole surfaces as the earth-boring apparatus is rotated.
  • the new and improved apparatus of the present invention further includes direction-measuring means and fluid-control means operable upon rotation of the earth-boring apparatus for sequentially discharging each of these fluid streams only into selected sectors of the borehole so as to selectively control the direction of advancement of the earth-boring apparatus as required for deviating the borehole in a selected direction.
  • the fluid-control means are selectively operated so that continued rotation of the earth-boring apparatus will be effective for sequentially discharging the several streams of drilling fluid into all adjacent sectors of the borehole for excavating the borehole along a generally straight course.
  • the fluid-control means are selectively operated so that, as the earth-boring apparatus continues to rotate, these several fluid streams will be sequentially discharged into only a selected adjacent sector of the borehole.
  • FIG. 1 a new and improved directional drilling tool 10 arranged in accordance with the principles of the present invention is depicted dependently suspended from the lower end of a tubular drill string 11 typically comprised of one or more drill collars, as at 12, and multiple joints of drill pipe as at 13.
  • Rotatable earth-boring apparatus such as a typical drill bit 14 is coupled to the lower end of the directional drilling tool 10 and operatively arranged for excavating a borehole 15 through various subsurface earth formations, as at 16, in response to rotation of the drill string 11.
  • a substantial volume of a suitable drilling fluid or a so-called "mud” is continuously pumped downwardly through the tubular drill string (as shown by the arrow 17).
  • the mud 17 is subsequently discharged from multiple fluid passages (not seen in FIG. 1) in the drill bit 14 for cooling the bit as well as for carrying formation materials removed by the bit to the surface as the drilling mud is returned upwardly (as shown by the arrow 18) by way of the annular space in the borehole 15 outside of the drill- string.
  • the directional drilling tool of the present invention is preferably arranged to include a plurality of tubular bodies, as at 19-22. lubricate the bit as well as to flush away loosened formation materials which might otherwise collect between these cutting members.
  • the flow-dividing means 34 further include a multi-ported member 38 having three angularly distributed partitions 40-42 dependently secured thereto.
  • the member 38 and the partitions 40-42 are sealingly mounted within the axial bore 43 of the bit body 31 and cooperatively arranged for defining therein separated chambers or individual fluid passages 44-46 serving as upper extensions of their associated fluid passages 35-37 of the bit 14 which, by means of three uniformly-spaced ports 47-49 in the member 38, respectively communicate the bit passages with the upper portion of the axial bore 43.
  • the fluid-directing means 27 further include a fluid-diverting member 50 having an axially aligned shaft 51 rotatably journalled in the tool body 22 by one or more bearings (not illustrated). As will be subsequently described with reference to FIG. 3, the fluid-diverting member 50 is cooperatively arranged for rotation in a transverse plane cutting the lower end of the tool body 22 and lying immediately above the multi-ported member 38 when this tool body is coupled to the bit 14.
  • the rotatable diverter 50 is preferably configured so that at least one of the three fluid ports 47, 48 or 49 will be substantially blocked in any given angular position of the diverter.
  • the diverter 50 is arranged as a circular member having a segmental flow-obstructing portion 52 which subtends an arc of 240 degrees (i.e., twice the angular spacing of the equally spaced fluid ports 47-49) and a flow-directing portion such as an arcuate opening 53 which subtends an arc of 120 degrees (i.e., equal to the angular, spacing between the ports 47-49).
  • the divided fluid streams 54 and 55 exiting at that moment from the bit passages 35 and 36 will be directed only into that sector of the borehole 1 5 which is at that time immediately adjacent to that side of the drill bit. Accordingly, unless the drill bit 14 is rotating at that particular moment, the continued discharge of the fluid streams, as at 54 and 55, into this sector of the borehole 15 will ultimately be effective for eroding away the adjacent borehole surface.
  • the diverter 50 is adapted so that it can be selectively positioned as required for communicating the flowing drilling mud, as at 17 . with any given one or two of the three fluid ports 47-49.
  • the fluid diverter 50 can be selectively positioned as desired to cooperatively direct streams of drilling mud, such as those shown at 54 and 55, into any given sector of the borehole 15. All that is necessary is to rotate the diverter 50 to the angular position in relation to the drill bit 14 that is required for correspondingly discharging one or two streams of drilling mud into the selected borehole sector.
  • the new and improved directional drilling tool 10 for selectively directing the advancement of earth boring apparatus, such as the drill bit 14, along a desired course of excavation.
  • the new and improved directional drilling tool 10 may be arranged as depicted somewhat schematically in FIG. 3.
  • the stream of drilling mud, as at 17, flowing through the drill string 11 (FIG. 1) serves as an effective medium for transmitting acoustic signals to the surface at the speed of sound in that particular drilling mud.
  • the data-signalling means 23 preferably include an acoustic signaler 57 such as one of those described,- for example, in U.S.
  • Patent Nos. 3,309,565 and 3,764,970 for transmitting either frequency-modulated or phase-encoded data signals to the surface by way of the flowing mud stream as at 17.
  • the signaler 57 includes a fixed stator 58 operatively associated with a rotatable rotor 59 for producing acoustic signals of the desired character.
  • This rotor 59 is rotatively driven by means such as a typical motor 60 operatively controlled by way of a suitable motor-control circuitry as at 61.
  • the data-signalling means 23 further include a typical turbine-driven hydraulic pump 62 which utilizes the flowing mud stream, as at 17, for supplying hydraulic fluid as required for driving the signaler motor 60 as well as a motor-driven generator 63 supplying power to the several electrical components of the directional-drilling tool 10.
  • a typical turbine-driven hydraulic pump 62 which utilizes the flowing mud stream, as at 17, for supplying hydraulic fluid as required for driving the signaler motor 60 as well as a motor-driven generator 63 supplying power to the several electrical components of the directional-drilling tool 10.
  • the direction-measuring means 24 include means such as a typical triaxial magnetometer 64 cooperatively arranged for providing electrical output signals representative of the angular positions of the directional drilling tool relative to a fixed, known reference such as the magnetic north pole of the earth.
  • the direction-measuring means 24 further include means such as a typical triaxial accelerometer 65 that is cooperatively arranged for providing electrical output signals that are representative of the inclination of the tool with respect to the vertical.
  • the output signals of these two direction-measuring devices 64 and 65 are operatively coupled to the data-acquisition and motor control circuitry 61 as required for cooperatively driving the acoustic signaler motor 60.
  • the output signals of the condition-measuring means 26 may also be coupled to the data-acquisition and motor-control circuitry 61 for transmitting data signals representative of these measured conditions to the surface.
  • a suitable pressure-responsive signal detector 66 is cooperatively arranged in a conduit 67 coupled between the discharge side of the mud pump (not illustrated) and the surface end of the drill string 11 (FIG. 1) for detecting the cyclic pressure variations developed by the acoustic signaler in the flowing mud stream 17 passing through the conduit.
  • suitable signal-decoding and processing circuitry 68 is coupled to the signal detector 66 and adapted to convert the data conveyed by the acoustic signals in the mud stream 17 to a signal form which is appropriate for driving a typical signal recorder 69.
  • the signal recorder 69 is appropriately arranged for recording the data measurements carried by the acoustic signals as a function of the depth of the drill bit 14.
  • the principal object of the present invention is to employ the new and improved directional. drilling tool 10 for selectively directing the advancement of earth ⁇ boring apparatus, such as the drill bit 14, along a desired course of excavation.
  • the direction-measuring means 24 are cooperatively arranged for producing output control signals which are representative of the spatial position of the directional control tool 10 in the borehole 15.
  • the output signals of the magnetometer 64 and the accelerometer 65 are respectively correlated with appropriate reference signals, as at 70 and 71, and combined by circuitry 72 for providing output control signals which are representative of the azimuthal position and inclination of the directional drilling tool 10 in the borehole 15.
  • the output tool position signals produced by the circuitry 72 are operatively coupled by means of typical summing-and-integrating circuitry 73 to a typical hydraulic or electrical driver 75 which is coupled to the shaft 51 and arranged for selectively driving the diverter 50 at various rotational speeds.
  • the direction controlling means 25 further include a rotary-position transducer 76 operatively arranged for providing output signals that are representative of the rotational speed of the fluid diverter 50 as well as its angular position in relation to the tool body 22 and the drill bit 140 As is common, feedback signals from the transducer 76 are coupled to the circuitry 73 for controlling the driver 75.
  • the output signals from the transducer 76 are also coupled to the data-acquisition and motor-control circuitry 61 for providing output signals at the surface representative of the rotational speed and the angular position of the fluid diverter 50 in relation to the body 22 of the new and improved directional-drilling tool 10.
  • a reference signal source as at 77, is cooperatively arranged to be selectively coupled to the servo driver 75
  • the control device 78 could be chosen to be responsive to predetermined changes in the flow rate of the drilling mud 17 in the drill string 11.
  • the directional-controlling means 25 could be readily changed from one operational mode to another desired mode by simply controlling the mud pumps (not depicted) as required to momentarily increase or decrease the flow rate of the drilling mud 17 which is then circulating in the drill string 11 to some predetermined higher or lower flow rate.
  • the control device 78 could just as well be chosen to be actuated in response to predetermined levels or variations in the weight-on-bit measurements in the drill string 11.
  • an alternative remotely-actuated device 78 could be one that would be responsive to the passage of slugs of a radioactive tracer fluid in the drilling mud stream 17. Still other means for selectively actuating the control device 78 will, of course, be apparent to.. those skilled in the art.
  • the motor 75 is operated for selectively rotating the fluid diverter 50 in the direction indicated by the arrow 79 (FIG. 2).
  • the rotational direction 79 of the diverter 50 is preferably counter to the rotational direction 56 of the drill bit 14.
  • ithe direction controlling means 25 are operated so that the fluid diverter 50 will be counter rotated at substantially the same rotational speed of the drill bit. As schematically illustrated in FIGS.
  • the circulating mud 17 will be sequentially discharged from the rotating drill bit 14 either as dual fluid streams (as at 54 and 55) or as a single fluid stream (as at 81), with each of these . fluid streams being sequentially discharged only into the immediately-adjacent borehole sector 82.
  • the sequential discharge of these dual fluid streams (as at 54 and 55) and the single fluid streams (as at 81) will repetitively direct these several streams across only those borehole surfaces lying in that particular sector 82 of the borehole 15.
  • the rotational speed of the drill bit 14 will be continuously varying during a typical drilling operation as the bit successively meets greater or less opposition to its further progress.
  • the operation of the direction-controlling means 25 is better directed toward retaining the fluid diverter 50 in a fixed relative position in the borehole 15 than it is to maintain equal rotational speeds of the drill bit 14 and diverter.
  • the output signals of the magnetometer 64 and the rotary-position-transducer 76 will, of course, provide the necessary control signals for maintaining the diverter 50 in a given angular relationship with respect to the borehole 15 and within the limits established by the azimuth reference signals 70.
  • the fluid diverter 50 would tend to vacillate or waver back and forth on opposite sides of a given position as the direction controlling means 25 operate for positioning the diverter in a given angular position.
  • the diverter 50 instead of the diverter 50 precisely remaining in the same angular position as shown in the idealized situation portrayed in FIGS. 4-A to 4-C, the diverter will ordinarily shift back and forth on opposite sides of the line 80 within a limited span of movement.
  • the several fluid streams, as at 54, 55 and 81 will still be sequentially discharged into the selected 'borehole sector 82 for accomplishing the objects of the present invention.
  • the direction-controlling means 25 are further arranged so that, when desired, further diversion of the drill bit 14 can be selectively discontinued so that the drill bit will thereafter advance along a generally straight-line course of excavation.
  • the remotely-actuated control device 78 is actuated (such as, for example, by effecting a momentary change in the speed of the mud pumps at the surface) to cause the driving motor 75 to function as necessary to rotate the diverter 50 at a nonsynchronous speed in relation to the rotational speed of the drill bit 14.
  • the same operation of the direction-controlling means 25 can be realized by cooperatively operating the driving motor 75 so as to selectively advance and retard the rotational position of the diverter 50 with respect to the borehole 15. If the limits of such advancement and retardation are set sufficiently far apart, the net result will be simply swing the flow-diverting opening 53 back and forth over a sufficiently-large span of travel that the several fluid streams (as at 84-86) will be selectively emitted into most, if not all, adjacent sectors of the borehole 15. It should also be considered that this alternate advancement and retardation of the fluid diverter 50 will be similar to the back and forth movement of the diverter as depicted in FIGS. 5-A to 5-C except that the limits of movement will be much greater than the relatively narrow limits illustrated there so that the sequentially emitted fluid streams (as at 54, 55 and 81) will essentially traverse the full circumference of the borehole 15.
  • the surface recorder 69 will permit the operator to monitor the operation of the new-and improved drilling control tool 10. Moreover, by virtue of the directional-controlling means 25, the operator can also be aware of the position of the fluid diverter 50 and select the operational mode of the tool 10. as the borehole 15 is being drilled as well as subsequently change its operational mode by simply actuating the remotely-actuated control device 78.
  • condition-responsive device 78 is actuated from the surface in a suitable manner for moving the diverter 50 to a selected angular position in relation to the borehole. As previously described in relation to FIGS. 4-A to 4-C, this is ideally accomplished by rotating the diverter 50 counter to and at the same rotational speed as the drill bit 14. The actuation of the control device 78 will be effective, therefore, for thereafter sequentially discharging the several streams of drilling mud (as at 54, 55 and 81) into only .one selected sector (as at 82) of the borehole 15.
  • the direction-measuring means 24 will provide sufficient data measurements at the surface for the operator to monitor the spatial position of the new and improved directional drilling tool 10 in the borehole 15 as well as reliably control the further advancement of the drill bit 14.
  • the condition-responsive device 78 is again actuated from the surface as required to begin driving the fluid diverter 50 at a nonsynchronousl speed so that the drill bit will thereafter continue drilling the borehole 15 along a generally- straight course of excavation as was previously described by reference to FIGS. 6-A to 6-C.
  • the present invention has provided new and improved methods and apparatus for guiding well- boring apparatus such as a typical drill bit as it progressively excavates one or more discrete intervals of a borehole.
  • well- boring apparatus coupled thereto can be reliably advanced in any selected direction during the course of a drilling operation without requiring the removal of the drill string or the use of special apparatus to make corrective course adjustments for the -new and improved directional-drilling tool of the present invention to reach a desired remote location.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
EP86303938A 1985-05-31 1986-05-23 Procédé et dispositif pour le forage directionnel contrôlé des puits Expired EP0204474B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US740110 1985-05-31
US06/740,110 US4637479A (en) 1985-05-31 1985-05-31 Methods and apparatus for controlled directional drilling of boreholes

Publications (2)

Publication Number Publication Date
EP0204474A1 true EP0204474A1 (fr) 1986-12-10
EP0204474B1 EP0204474B1 (fr) 1989-04-12

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EP86303938A Expired EP0204474B1 (fr) 1985-05-31 1986-05-23 Procédé et dispositif pour le forage directionnel contrôlé des puits

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US (1) US4637479A (fr)
EP (1) EP0204474B1 (fr)
CA (1) CA1250280A (fr)
DE (1) DE3662802D1 (fr)
DK (1) DK257586A (fr)
NO (1) NO172258C (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335543A1 (fr) * 1988-03-18 1989-10-04 Pilot Drilling Control Limited Dispositif de forage
EP0343800A2 (fr) * 1988-05-20 1989-11-29 Utilx Corporation Dispositif pour l'exécution d'un tunnel
EP0397323A1 (fr) * 1989-05-08 1990-11-14 Cherrington Corporation Trépan à jets avec dispositif de déviation intégré
EP0429254A2 (fr) * 1989-11-17 1991-05-29 Dickinson III, Ben Wade Oakes Méthode pour forer dans le sol
EP0520733A1 (fr) * 1991-06-25 1992-12-30 Camco Drilling Group Limited Système de forage à rotation pour déviation réglable
EP0685624A3 (fr) * 1994-06-04 1997-01-15 Camco Drilling Group Ltd Unité de déviation réglable pour forage rotatif.
EP0792995A1 (fr) * 1996-02-27 1997-09-03 Tracto-Technik Paul Schmidt Spezialmaschinen Procédé de guidage d'un dispositif de forage du sol
AU689696B2 (en) * 1991-06-25 1998-04-02 Camco Drilling Group Limited Improvements in or relating to steerable rotary drilling systems
US5924500A (en) * 1996-05-21 1999-07-20 Tracto-Technik, Paul Schmidt, Spezialmaschinen Steerable boring machine
US6467557B1 (en) 1998-12-18 2002-10-22 Western Well Tool, Inc. Long reach rotary drilling assembly
US6470974B1 (en) 1999-04-14 2002-10-29 Western Well Tool, Inc. Three-dimensional steering tool for controlled downhole extended-reach directional drilling
GB2438289A (en) * 2006-05-16 2007-11-21 Schlumberger Holdings Tri-stable actuator to direct a rotary steerable tool
WO2014177502A1 (fr) * 2013-04-29 2014-11-06 Shell Internationale Research Maatschappij B.V. Procédé et système de forage directionnel
WO2014177505A1 (fr) * 2013-04-29 2014-11-06 Shell Internationale Research Maatschappij B.V. Procédé et système de forage directionnel
US10151150B2 (en) 2013-04-29 2018-12-11 Shell Oil Company Insert and method for directional drilling
GB2605358A (en) * 2021-03-03 2022-10-05 Enteq Tech Plc Cartridge for a rotary drill bit
WO2024018233A1 (fr) * 2022-07-21 2024-01-25 Enteq Technologies Plc Sous-ensemble pour un système de forage directionnel

Families Citing this family (110)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2190411B (en) * 1986-05-16 1990-02-21 Shell Int Research Apparatus for directional drilling.
FR2599423B1 (fr) * 1986-05-27 1989-12-29 Inst Francais Du Petrole Procede et dispositif permettant de guider un forage a travers des formations geologiques.
US4854397A (en) * 1988-09-15 1989-08-08 Amoco Corporation System for directional drilling and related method of use
US4930586A (en) * 1989-05-12 1990-06-05 Ben Wade Oakes Dickinson, III Hydraulic drilling apparatus and method
EP0467642A3 (en) * 1990-07-17 1993-03-10 Camco Drilling Group Limited Earth drilling system and method for controlling the direction of a borehole
FR2673237B1 (fr) * 1991-02-25 1999-02-26 Elf Aquitaine Methode de surveillance automatique de l'etat vibratoire d'une garniture de forage.
US5160925C1 (en) * 1991-04-17 2001-03-06 Halliburton Co Short hop communication link for downhole mwd system
US5226488A (en) * 1991-07-10 1993-07-13 Bor-Mor Inc. Truck mounted boring system
JP2669209B2 (ja) * 1991-08-02 1997-10-27 株式会社大林組 回転式削孔機
US5553678A (en) * 1991-08-30 1996-09-10 Camco International Inc. Modulated bias units for steerable rotary drilling systems
GB9125778D0 (en) * 1991-12-04 1992-02-05 Anderson Charles A Downhole stabiliser
US5314030A (en) * 1992-08-12 1994-05-24 Massachusetts Institute Of Technology System for continuously guided drilling
GB2282614A (en) * 1993-10-05 1995-04-12 Anadrill Int Sa Bottom hole assembly for directional drilling
GB2284837B (en) * 1993-12-17 1997-11-12 Anadrill Int Sa Directional drilling method and apparatus
US5449046A (en) * 1993-12-23 1995-09-12 Electric Power Research Institute, Inc. Earth boring tool with continuous rotation impulsed steering
US5513713A (en) * 1994-01-25 1996-05-07 The United States Of America As Represented By The Secretary Of The Navy Steerable drillhead
US5421420A (en) * 1994-06-07 1995-06-06 Schlumberger Technology Corporation Downhole weight-on-bit control for directional drilling
US5484029A (en) * 1994-08-05 1996-01-16 Schlumberger Technology Corporation Steerable drilling tool and system
US5617926A (en) * 1994-08-05 1997-04-08 Schlumberger Technology Corporation Steerable drilling tool and system
US5483061A (en) 1994-09-07 1996-01-09 Schlumberger Technology Corporation Gamma ray scintillation detector apparatus and method for reducing shock induced noise
US5542482A (en) * 1994-11-01 1996-08-06 Schlumberger Technology Corporation Articulated directional drilling motor assembly
US5520256A (en) * 1994-11-01 1996-05-28 Schlumberger Technology Corporation Articulated directional drilling motor assembly
US5727641A (en) * 1994-11-01 1998-03-17 Schlumberger Technology Corporation Articulated directional drilling motor assembly
GB9503830D0 (en) * 1995-02-25 1995-04-19 Camco Drilling Group Ltd "Improvements in or relating to steerable rotary drilling systems"
GB9517378D0 (en) * 1995-08-24 1995-10-25 Sofitech Nv Hydraulic jetting system
GB9521972D0 (en) * 1995-10-26 1996-01-03 Camco Drilling Group Ltd A drilling assembly for drilling holes in subsurface formations
US5635711A (en) * 1996-04-25 1997-06-03 Schlumberger Technology Corporation Apparatus and method for the suppression of microphonic noise in proportional counters for borehole logging-while-drilling
BR9612567A (pt) * 1996-03-04 1999-07-20 Vermeer Mfg Co Máquina de perfuração direcional
AUPO062296A0 (en) * 1996-06-25 1996-07-18 Gray, Ian A system for directional control of drilling
US5880680A (en) * 1996-12-06 1999-03-09 The Charles Machine Works, Inc. Apparatus and method for determining boring direction when boring underground
US20020043404A1 (en) * 1997-06-06 2002-04-18 Robert Trueman Erectable arm assembly for use in boreholes
US6092610A (en) * 1998-02-05 2000-07-25 Schlumberger Technology Corporation Actively controlled rotary steerable system and method for drilling wells
US6158529A (en) * 1998-12-11 2000-12-12 Schlumberger Technology Corporation Rotary steerable well drilling system utilizing sliding sleeve
US7311148B2 (en) 1999-02-25 2007-12-25 Weatherford/Lamb, Inc. Methods and apparatus for wellbore construction and completion
US6109372A (en) * 1999-03-15 2000-08-29 Schlumberger Technology Corporation Rotary steerable well drilling system utilizing hydraulic servo-loop
US6257356B1 (en) * 1999-10-06 2001-07-10 Aps Technology, Inc. Magnetorheological fluid apparatus, especially adapted for use in a steerable drill string, and a method of using same
US7136795B2 (en) 1999-11-10 2006-11-14 Schlumberger Technology Corporation Control method for use with a steerable drilling system
US6601658B1 (en) 1999-11-10 2003-08-05 Schlumberger Wcp Ltd Control method for use with a steerable drilling system
US6357537B1 (en) 2000-03-15 2002-03-19 Vermeer Manufacturing Company Directional drilling machine and method of directional drilling
US6491115B2 (en) 2000-03-15 2002-12-10 Vermeer Manufacturing Company Directional drilling machine and method of directional drilling
US6530439B2 (en) * 2000-04-06 2003-03-11 Henry B. Mazorow Flexible hose with thrusters for horizontal well drilling
US7334650B2 (en) 2000-04-13 2008-02-26 Weatherford/Lamb, Inc. Apparatus and methods for drilling a wellbore using casing
US6648083B2 (en) 2000-11-02 2003-11-18 Schlumberger Technology Corporation Method and apparatus for measuring mud and formation properties downhole
FR2819850B1 (fr) * 2001-01-22 2003-12-19 Cie Du Sol Outil de forage a jet de liquide sous pression
US6552334B2 (en) 2001-05-02 2003-04-22 Schlumberger Technology Corporation Wellbore caliper measurement method using measurements from a gamma-gamma density
US6768106B2 (en) 2001-09-21 2004-07-27 Schlumberger Technology Corporation Method of kick detection and cuttings bed buildup detection using a drilling tool
US20030127252A1 (en) * 2001-12-19 2003-07-10 Geoff Downton Motor Driven Hybrid Rotary Steerable System
US6810971B1 (en) 2002-02-08 2004-11-02 Hard Rock Drilling & Fabrication, L.L.C. Steerable horizontal subterranean drill bit
US6810973B2 (en) 2002-02-08 2004-11-02 Hard Rock Drilling & Fabrication, L.L.C. Steerable horizontal subterranean drill bit having offset cutting tooth paths
US6810972B2 (en) 2002-02-08 2004-11-02 Hard Rock Drilling & Fabrication, L.L.C. Steerable horizontal subterranean drill bit having a one bolt attachment system
US6814168B2 (en) 2002-02-08 2004-11-09 Hard Rock Drilling & Fabrication, L.L.C. Steerable horizontal subterranean drill bit having elevated wear protector receptacles
US6827159B2 (en) 2002-02-08 2004-12-07 Hard Rock Drilling & Fabrication, L.L.C. Steerable horizontal subterranean drill bit having an offset drilling fluid seal
AU2002330595A1 (en) 2002-05-13 2003-11-11 Camco International (Uk) Limited Recalibration of downhole sensors
US20040108138A1 (en) * 2002-08-21 2004-06-10 Iain Cooper Hydraulic Optimization of Drilling Fluids in Borehole Drilling
AU2002952176A0 (en) * 2002-10-18 2002-10-31 Cmte Development Limited Drill head steering
AR045022A1 (es) * 2003-07-09 2005-10-12 Shell Int Research Sistema y metodo para perforar un objeto
WO2005005765A1 (fr) * 2003-07-09 2005-01-20 Shell Internationale Research Maatschappij B.V. Outil pour l'excavation d'un objet
RU2348786C2 (ru) * 2003-07-09 2009-03-10 Шелл Интернэшнл Рисерч Маатсхаппий Б.В. Инструмент для проходки объекта
ATE374304T1 (de) * 2003-10-29 2007-10-15 Shell Int Research Fluidstrahlbohrwerkzeug
US7357182B2 (en) * 2004-05-06 2008-04-15 Horizontal Expansion Tech, Llc Method and apparatus for completing lateral channels from an existing oil or gas well
US20060278393A1 (en) * 2004-05-06 2006-12-14 Horizontal Expansion Tech, Llc Method and apparatus for completing lateral channels from an existing oil or gas well
US7279677B2 (en) 2005-08-22 2007-10-09 Schlumberger Technology Corporation Measuring wellbore diameter with an LWD instrument using compton and photoelectric effects
US8522897B2 (en) * 2005-11-21 2013-09-03 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8360174B2 (en) * 2006-03-23 2013-01-29 Schlumberger Technology Corporation Lead the bit rotary steerable tool
US8297378B2 (en) * 2005-11-21 2012-10-30 Schlumberger Technology Corporation Turbine driven hammer that oscillates at a constant frequency
US8297375B2 (en) 2005-11-21 2012-10-30 Schlumberger Technology Corporation Downhole turbine
US7571780B2 (en) 2006-03-24 2009-08-11 Hall David R Jack element for a drill bit
US7730972B2 (en) * 2005-11-21 2010-06-08 Schlumberger Technology Corporation Downhole turbine
US8225883B2 (en) * 2005-11-21 2012-07-24 Schlumberger Technology Corporation Downhole percussive tool with alternating pressure differentials
US8316964B2 (en) * 2006-03-23 2012-11-27 Schlumberger Technology Corporation Drill bit transducer device
US8408336B2 (en) 2005-11-21 2013-04-02 Schlumberger Technology Corporation Flow guide actuation
US8528664B2 (en) 2005-11-21 2013-09-10 Schlumberger Technology Corporation Downhole mechanism
US7549489B2 (en) 2006-03-23 2009-06-23 Hall David R Jack element with a stop-off
US7360610B2 (en) * 2005-11-21 2008-04-22 Hall David R Drill bit assembly for directional drilling
US7753144B2 (en) 2005-11-21 2010-07-13 Schlumberger Technology Corporation Drill bit with a retained jack element
US7503405B2 (en) * 2005-11-21 2009-03-17 Hall David R Rotary valve for steering a drill string
US7464772B2 (en) * 2005-11-21 2008-12-16 Hall David R Downhole pressure pulse activated by jack element
US8011457B2 (en) 2006-03-23 2011-09-06 Schlumberger Technology Corporation Downhole hammer assembly
US8590636B2 (en) * 2006-04-28 2013-11-26 Schlumberger Technology Corporation Rotary steerable drilling system
US7954401B2 (en) * 2006-10-27 2011-06-07 Schlumberger Technology Corporation Method of assembling a drill bit with a jack element
US7866416B2 (en) 2007-06-04 2011-01-11 Schlumberger Technology Corporation Clutch for a jack element
US20100163308A1 (en) 2008-12-29 2010-07-01 Precision Energy Services, Inc. Directional drilling control using periodic perturbation of the drill bit
US7721826B2 (en) * 2007-09-06 2010-05-25 Schlumberger Technology Corporation Downhole jack assembly sensor
US7967083B2 (en) * 2007-09-06 2011-06-28 Schlumberger Technology Corporation Sensor for determining a position of a jack element
US20090133931A1 (en) * 2007-11-27 2009-05-28 Schlumberger Technology Corporation Method and apparatus for hydraulic steering of downhole rotary drilling systems
GB0811016D0 (en) 2008-06-17 2008-07-23 Smart Stabilizer Systems Ltd Steering component and steering assembly
US8186459B1 (en) 2008-06-23 2012-05-29 Horizontal Expansion Tech, Llc Flexible hose with thrusters and shut-off valve for horizontal well drilling
US20100163307A1 (en) * 2008-12-31 2010-07-01 Baker Hughes Incorporated Drill Bits With a Fluid Cushion For Reduced Friction and Methods of Making and Using Same
US9976360B2 (en) 2009-03-05 2018-05-22 Aps Technology, Inc. System and method for damping vibration in a drill string using a magnetorheological damper
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
CA2671171C (fr) * 2009-07-06 2017-12-12 Northbasin Energy Services Inc. Trepan avec interrupteur de debit
US8469104B2 (en) * 2009-09-09 2013-06-25 Schlumberger Technology Corporation Valves, bottom hole assemblies, and method of selectively actuating a motor
AU2010348358A1 (en) * 2010-03-15 2012-10-11 Vermeer Manufacturing Company Drilling apparatus with shutter
BR112012029804B1 (pt) 2010-05-26 2020-11-03 Wsp Global Inc método para remover água de uma mina, sistema de remoção de água de uma mina, e método de remoção de água de uma mina
EP2655782A1 (fr) 2010-12-22 2013-10-30 Shell Internationale Research Maatschappij B.V. Forage directionnel
US8672056B2 (en) * 2010-12-23 2014-03-18 Schlumberger Technology Corporation System and method for controlling steering in a rotary steerable system
US8376067B2 (en) * 2010-12-23 2013-02-19 Schlumberger Technology Corporation System and method employing a rotational valve to control steering in a rotary steerable system
US9121223B2 (en) * 2012-07-11 2015-09-01 Schlumberger Technology Corporation Drilling system with flow control valve
US9133950B2 (en) * 2012-11-07 2015-09-15 Rime Downhole Technologies, Llc Rotary servo pulser and method of using the same
US20150337598A1 (en) * 2014-05-25 2015-11-26 Schlumberger Technology Corporation Pressure Booster for Rotary Steerable System Tool
US10316598B2 (en) * 2014-07-07 2019-06-11 Schlumberger Technology Corporation Valve system for distributing actuating fluid
EP3034189A1 (fr) 2014-12-18 2016-06-22 Shell Internationale Research Maatschappij B.V. Ensemble et procédé pour élargir un élément tubulaire
EP3034778A1 (fr) 2014-12-18 2016-06-22 Shell Internationale Research Maatschappij B.V. Ensemble et procédé pour élargir un élément tubulaire
EP3034777A1 (fr) 2014-12-18 2016-06-22 Shell Internationale Research Maatschappij B.V. Ensemble et procédé pour élargir un élément tubulaire
WO2018075109A1 (fr) * 2016-10-19 2018-04-26 Halliburton Energy Services, Inc. Vannes rotatives résistantes à la dégradation pour des outils de fond de trou
WO2019072836A1 (fr) * 2017-10-12 2019-04-18 Shell Internationale Research Maatschappij B.V. Système de forage orientable rotatif, raccord de train de tiges de forage et procédé de fonctionnement d'un tel système
NL2024001B1 (en) 2019-10-11 2021-06-17 Stichting Canopus Intellectueel Eigendom Method and system for directional drilling
US20220282571A1 (en) 2021-03-02 2022-09-08 Infinity Drilling Technologies, LLC Compact rotary steerable system
CN114165167B (zh) * 2021-12-10 2023-03-28 江苏和信石油机械有限公司 一种一体驱动式新型救援钻杆
CN114159709B (zh) * 2021-12-10 2023-01-31 江苏和信石油机械有限公司 一种排浆高度调节式钻井救援装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075064A (en) * 1936-05-26 1937-03-30 James H Schumacher Direction control mechanism for well drilling tools
US2956781A (en) * 1958-02-17 1960-10-18 Eastman Oil Well Survey Co Deflecting tool
US3488765A (en) * 1967-12-21 1970-01-06 Edwin A Anderson Method and arrangement for selectively controlling fluid discharge from a drill bit on the lower end of a drill string
US3746108A (en) * 1971-02-25 1973-07-17 G Hall Focus nozzle directional bit
US4351116A (en) * 1980-09-12 1982-09-28 Bj-Hughes Inc. Apparatus for making multiple orientation measurements in a drill string

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2142559A (en) * 1937-11-24 1939-01-03 Lane Wells Co Orienting device
US2873092A (en) * 1957-11-14 1959-02-10 Roy P Dwyer Jet deflection method of deviating a bore hole
US3309565A (en) * 1959-12-14 1967-03-14 Mc Graw Edison Co Light output of fluorescent lamps automatically held constant by means of peltier type coolers
US3313360A (en) * 1965-01-11 1967-04-11 Eastman Oil Well Survey Hydraulically actuated orienting device
US3365007A (en) * 1965-10-24 1968-01-23 Wilson Supply Co Directional drilling tool and method
US3360057A (en) * 1965-12-06 1967-12-26 Edwin A Anderson Fluid controlled directional bit and its method of use
US3457999A (en) * 1967-08-31 1969-07-29 Intern Systems & Controls Corp Fluid actuated directional drilling sub
US3593810A (en) * 1969-10-13 1971-07-20 Schlumberger Technology Corp Methods and apparatus for directional drilling
US3693142A (en) * 1969-11-21 1972-09-19 Jack W Jones Borehole orientation tool
US3599733A (en) * 1969-12-15 1971-08-17 R F Varley Co Inc Method for directional drilling with a jetting bit
US3764970A (en) * 1972-06-15 1973-10-09 Schlumberger Technology Corp Well bore data-transmission apparatus with debris clearing apparatus
US4307786A (en) * 1978-07-27 1981-12-29 Evans Robert F Borehole angle control by gage corner removal effects from hydraulic fluid jet
US4416339A (en) * 1982-01-21 1983-11-22 Baker Royce E Bit guidance device and method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075064A (en) * 1936-05-26 1937-03-30 James H Schumacher Direction control mechanism for well drilling tools
US2956781A (en) * 1958-02-17 1960-10-18 Eastman Oil Well Survey Co Deflecting tool
US3488765A (en) * 1967-12-21 1970-01-06 Edwin A Anderson Method and arrangement for selectively controlling fluid discharge from a drill bit on the lower end of a drill string
US3746108A (en) * 1971-02-25 1973-07-17 G Hall Focus nozzle directional bit
US4351116A (en) * 1980-09-12 1982-09-28 Bj-Hughes Inc. Apparatus for making multiple orientation measurements in a drill string

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0335543A1 (fr) * 1988-03-18 1989-10-04 Pilot Drilling Control Limited Dispositif de forage
EP0343800A2 (fr) * 1988-05-20 1989-11-29 Utilx Corporation Dispositif pour l'exécution d'un tunnel
EP0343800A3 (fr) * 1988-05-20 1990-05-30 Utilx Corporation Dispositif pour l'exécution d'un tunnel
EP0397323A1 (fr) * 1989-05-08 1990-11-14 Cherrington Corporation Trépan à jets avec dispositif de déviation intégré
EP0429254A2 (fr) * 1989-11-17 1991-05-29 Dickinson III, Ben Wade Oakes Méthode pour forer dans le sol
EP0429254A3 (en) * 1989-11-17 1992-04-08 Ben Wade Oakes Dickinson, Iii Drilling a bore hole in the earth
EP0520733A1 (fr) * 1991-06-25 1992-12-30 Camco Drilling Group Limited Système de forage à rotation pour déviation réglable
US5265682A (en) * 1991-06-25 1993-11-30 Camco Drilling Group Limited Steerable rotary drilling systems
AU666850B2 (en) * 1991-06-25 1996-02-29 Camco Drilling Group Limited Improvements in or relating to steerable rotary drilling systems
AU689696B2 (en) * 1991-06-25 1998-04-02 Camco Drilling Group Limited Improvements in or relating to steerable rotary drilling systems
EP0685624A3 (fr) * 1994-06-04 1997-01-15 Camco Drilling Group Ltd Unité de déviation réglable pour forage rotatif.
EP0792995A1 (fr) * 1996-02-27 1997-09-03 Tracto-Technik Paul Schmidt Spezialmaschinen Procédé de guidage d'un dispositif de forage du sol
US6012536A (en) * 1996-02-27 2000-01-11 Tracto-Technik Schmidt Spezialmaschinen Method for steering a ground-drilling machine
GB2313392B (en) * 1996-05-21 2000-05-24 Tracto Technik Steerable boring machine
US5924500A (en) * 1996-05-21 1999-07-20 Tracto-Technik, Paul Schmidt, Spezialmaschinen Steerable boring machine
US6467557B1 (en) 1998-12-18 2002-10-22 Western Well Tool, Inc. Long reach rotary drilling assembly
US6470974B1 (en) 1999-04-14 2002-10-29 Western Well Tool, Inc. Three-dimensional steering tool for controlled downhole extended-reach directional drilling
US6708783B2 (en) 1999-04-14 2004-03-23 Western Well Tool, Inc. Three-dimensional steering tool for controlled downhole extended-reach directional drilling
US6942044B2 (en) 1999-04-14 2005-09-13 Western Well Tools, Inc. Three-dimensional steering tool for controlled downhole extended-reach directional drilling
GB2438289A (en) * 2006-05-16 2007-11-21 Schlumberger Holdings Tri-stable actuator to direct a rotary steerable tool
WO2014177502A1 (fr) * 2013-04-29 2014-11-06 Shell Internationale Research Maatschappij B.V. Procédé et système de forage directionnel
WO2014177505A1 (fr) * 2013-04-29 2014-11-06 Shell Internationale Research Maatschappij B.V. Procédé et système de forage directionnel
US10041302B2 (en) 2013-04-29 2018-08-07 Shell Oil Company Method and system for directional drilling
US10100627B2 (en) 2013-04-29 2018-10-16 Shell Oil Company Method and system for directional drilling
US10151150B2 (en) 2013-04-29 2018-12-11 Shell Oil Company Insert and method for directional drilling
GB2605358A (en) * 2021-03-03 2022-10-05 Enteq Tech Plc Cartridge for a rotary drill bit
GB2605358B (en) * 2021-03-03 2023-08-16 Enteq Tech Plc Cartridge for a rotary drill bit
WO2024018233A1 (fr) * 2022-07-21 2024-01-25 Enteq Technologies Plc Sous-ensemble pour un système de forage directionnel

Also Published As

Publication number Publication date
CA1250280A (fr) 1989-02-21
NO172258C (no) 1993-06-23
US4637479A (en) 1987-01-20
DK257586D0 (da) 1986-05-30
NO172258B (no) 1993-03-15
DK257586A (da) 1986-12-02
NO862062L (no) 1986-12-01
EP0204474B1 (fr) 1989-04-12
DE3662802D1 (en) 1989-05-18

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